Most admins want to keep an audit log for more than 90 days without E5/A5/G5 license or any additional add-ons. With Microsoft's recent update, you can retrieve the audit log for longer than 90 days and up to one year for all subscriptions.
Would be a welcome feature, but it certainly would help if Microsoft announced this somewhere officially. It's been all too often when something that's not announced turns out to be something that's unsupported, will break and whatever else :(
